Bruno Tilz 210-S 12 vs GR Technologies G66FD Radtke
The Bruno Tilz 210-S 12 has a wider cup diameter.
Mouthpiece A
Bruno Tilz 210-S 12
• Flugelhorn
CatalogCup diameter17.00 mm / 0.6693 in
Cup depth
Rim width—
Throat diameter3.90 mm / 0.1535 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
GR Technologies G66FD Radtke
• Flugelhorn
Cup diameter16.76 mm / 0.6598 in
Cup depthDeep
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
Cup Diameter
The Bruno Tilz 210-S 12 has a cup diameter of 17.00 mm / 0.6693 in compared to 16.76 mm / 0.6598 in on the GR Technologies G66FD Radtke — a difference of 0.24 mm / 0.0094 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Which is better?
Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.